Chihuahua Puppy Growth Chart

Chihuahua growth

If you're the proud owner of a Chihuahua puppy, you may wonder how big your furry friend will get.

Holding claim to the world's smallest dog breed, Chihuahuas typically weigh between two and six pounds when fully grown. Of course, that's a pretty wide range, leaving many owners pondering the following question: how big, or small, will by Chihuahua puppy get?

While you can look at the size of your pup's paws and parents to help predict his future weight, this isn't the most accurate method. Just because a puppy has small paws and small parents doesn't necessarily mean he will be small when fully grown. Assuming he's a pure-bred Chihuahua, however, you can typically predict a puppy's adult weight by referring to the growth chart below.

Why Do I Need to Know My Pup's Adult Size?

Predicting your Chihuahua pup's future weight is important for several reasons, including the following:

  • It helps owners make better decisions when choosing accessories such as crates, beds, collars, harnesses, leashes and clothes.
  • Larger Chihuahuas need more food, water and exercise.
  • Smaller Chihuahuas are more susceptible to physical injury.
  • You can identify health problems early if your Chihuahua is under or overweight.

Chihuahua Puppy Growth: What to Expect

Emerging into this world without the sense of sight, smell or hearing, Chihuahua puppies are completely dependent on their mother for nourishment. For the next few weeks, they'll spend 90% of their time sleeping and the remaining 10% nursing, allowing for substantial growth in a very short period of time.

  • Birth to 2 Weeks: With an average weight of just 2½ to 5½ ounces and length of 3 to 4 inches, newborn Chihuahua puppies are small enough to fit inside the palm of your hand. They'll grow rapidly during their first few weeks, however, often doubling in size while adding 5-10% of their body weight daily.
  • 11 to 15 Weeks: Your Chihuahua puppy will likely experience a growth spurt during this period, adding considerable weight in just a couple weeks.
  • 3 Months: By the end of three months, your Chihuahua puppy will reach about 30% of his adult weight.
  • 6 to 9 Months: Growth begins to slow down, with most Chihuahuas reaching their adult height of approximately 5.9 to 9.1 inches within 9 months. Your Chihuahua may still "fill out," but he shouldn't gain any significant amount of weight beyond this point.
  • 10 to 12 Months: Like most toy breeds, Chihuahuas typically reach maturity and stop growing by 10 to 12 months. However, you can still expect your Chihuahua's weight to fluctuate depending on his diet, health and physical activity levels.

How to Use the Growth Chart

The following growth chart predicts a pure-bred Chihuahua puppy's adult weight based on his current weight.

  1. If you don't already know your puppy's current weight, use a digital kitchen scale to weigh him. For newborn pups, wait until the mother leaves her nesting area to avoid being bitten.
  2. Find your puppy's current age on the left-hand column.
  3. Follow this row to the right until you find his current weight.
  4. Follow this column to the bottom where you'll find his expected adult weight.

Chihuahua growth chart

This growth chart can help you predict your Chihuahua's future adult weight. However, neither it nor any other prediction method is 100% accurate. No breeder can guarantee a pup will weight a certain amount when fully grown.

While this growth chart expresses weight in ounces and pounds, we've included a metric system conversion calculator below.


What Affects My Chihuahua's Growth?

Assuming your Chihuahua is pure bred, he will typically grow at the same pace as defined in the chart.

Note: some of the factors which may affect a Chihuahua puppy's growth include:

  • Genetics: The single most influential factor in determining a Chihuahua puppy's rate of growth and subsequent adult size is genetics, including the type of genes present and way in which those genes interact with one another. Because parents typically share the same genes as their pups, this is the basis on which growth charts work.
  • Nutrition: Chihuahua puppies should receive all of the necessary nutrients -- protein, amino acids, fatty acids, calcium, sugar, phosphorus, etc. -- from their mother's milk. After weaning off milk, however, they'll need a well-balanced food to promote healthy growth and development. If a pup diet doesn't include the right type and ratio of nutrients, he'll grow more slowly.
  • Physical Activity: While regular exercise is essential in building muscle and strong bones, too much can stunt a Chihuahua puppy's growth. A pup's leg bones grow from soft areas of undeveloped bone called growth plates (also known as epiphyseal plates). Intense and/or excessive physical activity can fracture these delicate structures, causing them to either stop growing or grow incorrectly
  • Hormones: Growth hormone levels in a Chihuahua puppy will affect his growth. If a pup's pituitary gland doesn't produce enough of this vital hormone, he may grow more slowly to a smaller adult size.
  • Health: Of course, the presence of disease and underlying health conditions can also affect a Chihuahua puppy's growth. Parasites like roundworms, whipworms and hookworms live in the pup's intestinal tract, restricting the pup's nutritional intake and growth.

What Should I Do if My Chihuahua Puppy is Underweight?

Not all Chihuahua puppies follow the same cookie-cutter growth rate as defined in the chart above. Some grow more slowly than others -- and that's okay. If your Chihuahua consistently weighs less than what he should, however, you should take precautions to ensure there's no underlying health condition or problem to blame.

First, make sure you are feeding your pup "puppy" formulated dog food. It has a higher caloric content to meet pups' growth demands. If your pup is still nursing, make his littermates aren't restricting his access.

You should also ask the veterinarian to perform a physical examination of your pup when taking him to get his first vaccination (around 5 to 6 weeks). During this visit, the veterinarian can check to see if your pup is suffering from parasites, malnutrition or other problems that could stunt his growth.

Chihuahua growth 3 months to 1 year

Did this growth chart work for your Chihuahua? Let us know in the comments section below!


42 Responses to “Chihuahua Puppy Growth Chart”

  1. Renee says:

    I have a very tiny mirco teacup chihuahua. How many pounds should she be where she a full adult. Dad is 2.5 pounds and mom 3 pounds

  2. Bre says:

    I have a six week old teacup chihuahua that looks six days old… her sister from the same litter is a happy healthy fur ball that more than triples my puppies size… my chihuahuas head is not proportional to her scrawny body an I don’t know how to make her gain weight… it’s hard for her to walk, or even stand because her head is so heavy and her body us so fragile… I have been bottle feeding because even nursing seems to be impossible for her, but it’s not enough… her sister is already eating soft puppy food… but like I sad my puppy can barely stand so I can’t get her to eat on her own… help?

  3. DAINE says:


  4. Diane says:

    I have a chipoo. She will be 7 months on the 31st of december. She weighs 6 1/2 pounds. Is this ok weight for her?
    And what is the best food to feed her. She is so picky. I have had her since august 2016 and been through so many differant brands of dry food and wet. Had to return and now she is eating homemade cooked here at house. However I need to make sure she is getting all the right nutrition she needs for her age.
    Any help would be appreciated.

    • Tristin says:

      well i got a chihuahua and i was told she was 8 weeks when i took her to the vet (and keep in mind we got her off the street form theses people selling puppy on the side of the road) and i was hoping to get here shots but i found out she had worms and she was only 2 pounds and 2 oz i tried all i could to keep her healthy and now she is 10 weeks and she is normal size and very healthy next up is getting her shots !!!

  5. Katiusca Perez says:

    Hi my chihuahua is 6 weeks old and weighs 1 pound 14 ounces. What will be her adult weight? I don’t understand the chart. Thank you.

  6. Kyle says:

    My 7.5 month old Chihuahua pup is almost 10 pounds is that bad?

  7. Jazmine says:

    If my Malchi is 3 pounds at 10 weeks then what can she be by the one year mark??

    • Katie says:

      I’d say about 7-7 1/2 lbs possibly up to 8 but these charts are a generalization and not always 100% accurate. usually whatever weight they are at 12 weeks is half of their adult size so just double its 12 week weight.

  8. Deborah says:

    I am beyond horrible at any math or charts. My chi at age 16 weeks weighed 3 pounds and 3 ounces. I can’t figure out by these charts if she will be 5 1/2 pounds or 8 pounds. It really doesn’t matter if she stays very small,but I am older and if she stays on the smaller side,i would be able to bathe her in my sink. Can anyone give me a guesstimate of her full grown weight?

    • Ian says:

      Between 5 lbs and 5lbs 8 ozs

    • Kristy says:

      3 pounds 3 ounces is 51 ounces. So at 16 weeks that puts her at about 5 1/2 pounds range. Enjoy your chi!

    • Jennifer says:

      Your pup weighed 51oz at 16wks & is charting between 5 & 5.5lbs

    • Katie says:

      5-5 1/2 lbs according to this growth chart but they aren’t 100% accurate just an estimation

    • JUDI NAIL says:

      You don’t have to be good at math, you just find the row where age & weight intersect then follow same row to bottom of chart and an estimated weight is given. I looked up yours & it says 3.5 lbs. That can be changed of course by genetics, nutrition & feeding.

  9. Carolyn says:

    Here’s a suggestion! Based on the fact that many Chihuahua owners have Chihuahuas over the standard size limit, why don’t you publish something that meets up with reality! We aren’t concerned about CKC or AKC standards, we just want a guestimate of what our fur babies will weigh when adult.

  10. Stephanie Lucas says:

    Funny thing about what the breeders say about weight. When I got my foundation bitches my breeder told me “4 1/2 pounds if you feed dry dog food, 5 1/2 -6 if you feed her wet”.
    Very interesting response.
    Chihuahuas don’t breed true. Not with color or size. Strictly show breeders (because their show females would be inside weight restrictions) might more than home breeders (maybe)..
    But no one wants C section births so it’s usually little boys x bigger girls.

  11. chris says:

    Or is that normal for them to weigh that much

  12. chris says:

    My Pure-Breed Chihuahua weighs almost 9 lbs. what could be the problem?

    • Stephanie Lucas says:

      Breeders have traditionally saved the biggest and best females for breeding (to avoid C sections) and breed to smaller boys. So chihuahuas do not breed true and have several sizes of dogs in a litter.

      I have a beautiful 10 pound (and not fat) male who is head of security and took on a pit bull (ok maybe he’s not too bright). The only issues with size are in the show ring (which I don’t do) otherwise size is irrelevant.

    • Helen says:

      My 1/2 teacup 1/2 full size Chihuahua weighed in at 8.7 pounds at the last vet visit.

  13. Andrea says:

    The chart is an estimate! Each individual puppy is the result of genetics, just like with human children one can be born small and grow to be 6 feet tall. It all has to do in the gene and pedigree of each puppy, the smallest in one litter could be 11 oz at 8 weeks and outgrow the biggest one from another litter. Why??? Because of genetics, buy from reputable breeders who know their lines. My chihuahuas were big puppies and have stayed under 2.5 lbs because the breeder knew the lines.

    • shelly faye says:

      um i dont my chiwawa would grow but she dosent eat a lot lately but do you think chiwawas grow beacause she s
      small and dosesnt grow like my yorkie either um umiko is a very playful dog um she poops everywhere in the house uh but the poop do sent smell bad because she always eat dog food like my yorkie does

    • Patti says:

      where did you purchase your Chihuahua? Thanks Patti

  14. verlanemcdonald says:

    Cand i breed my pure breed 6 pound 7 ounce chihuahua with a 10 pound chihuahua male

  15. Natasha says:

    Wow, my puppies is way off the chart. She weighed 6.1 oz at birth, and now at 2 weeks old she is 1pound 5oz. Does that mean she is going to be like 10lbs when she is done growing?
    She is a purebred Chihuahua, and her parents both have papers, and are both around 5pounds.

    • Heather says:

      I wouldn’t do it. Rule of thumb: Always use a small stud. Smaller than the female. Female should never be the smaller of the two as the puppies could be too big for her to birth. They could get caught in the birth canal and a cesarean may be necessary. You could risk losing the puppies and even the Mother. Makes sense if ya think about it, ya know? Mom should always be bigger than Dad, full grown. Don’t let Mom get pregnant during her 1st heat. This is equivalent to a woman getting pregnant as a teenager. Good luck!

      • Chelsey says:

        My chihuahua was 1 pound 7 ounces at 6 weeks and now at 10 weeks she is 2.1. She is charting to be around 4 1/2 pounds from what the vet said.

  16. Debbie says:

    Sorry I used connect the letters should have prof read 1st

  17. Debbie says:

    I think I was lied to the breader she ny puppy was 3 mos. but I think she was only 8 weeks so she looked smaller she is suppose to bbe between a tea cup and a mini I was told she was born Aug. 30 and as of today she weighs 2.2lbs and he back teeth r still not althe way out please let me know what you think

  18. Ellen Curtis says:

    I have a 15 week old chihuahua puppy. He is weighing at this time aprox 24 oz which puts him in the 2.5 to 3 lb category. How much food should I be feeding him so he will not get larger or fatter then he should be. I have 6 other chihuahuas all of which are chow hounds and over weight. I don’t want this to happen to this tiny little boy.

  19. tammy says:

    My pup is inline according to your chart to end up at 5.5lbs does gender have much influence on the size as I have heard that the females are often larger.

  20. Marco says:

    Excellent growth chart, thanks for the info, I’m a newly Chi owner and some things drive me MAD 😀 So I find your site very helpful, thanks again!

  21. Andrea says:

    I am a Chihuahua breeder and this is precise. Yes no one can be 100% sure of adult weight as lots of factors are involved but a good breeder should know the lines and have a good idea. I love this chart, great jobs guys.

  22. Shannon says:

    This growth chart was spot on! Thank u!

  23. Sherree says:

    We bought 2 chi sisters when they were 9 weeks old. They weighed 1 lb and the other was 12 oz. The vet didn’t know if she would ever make it to 3 lbs. In a few days they will be 8 months old…the 1 lb female now weights 5 lbs 7 oz (according to chart she should have ended up around 2 1/2 to 3 pounds, the other that weighed just 12 oz. is now 6 lbs. 11 oz. I seen both parents, their mother weighed 4 1/2 pounds, the father was 3 lbs. so you can NEVER go by this chart. It didn’t even come close for our two girls. Admittedly the 6 lb one is overweight…but not by 4 pounds. lol So be prepared to love your puppy no matter how big he or she gets because it may not stay the 2 to 3 pounds you thought it was going to.

    • Ellen Curtis says:

      I have had similar situations in 5 cases. I now have a new puppy weighing 1.5 oz at 15 wks. Don’t want him to get bigger them he supposed to. Told parents are 3 lbs and 2 lbs. he was only one in the liter. How much should I feed him per day so not to make him over weight?

  24. Mike says:

    Thanks My dog is doing just that. thinking it was some Type of sezure.Whenever she plays she starts

    • Rachelle says:

      Hi, I Raise Chihuahuas for show. I’ve taken a couple years off and just getting back into it
      This chart has been a helpful guide to keeping track of my puppies growth as weight change or lack thereof is the first thing that indicates if a tiny puppy is doing well or may be in trouble. I weigh mine each twice a day on a food scale for the first several weeks. When they are tiny it’s the fastest and most accurate way to discover if there are any problems and there by to save a puppy who for some reason just isn’t getting as much nutrition. It is pretty accurate with future weight as well but there is always a chance of a puppy being smaller or larger. This chart is just a guide and a very useful tool as well. Thank you.

      btw, using this chart as zip have, it has helped me and people I know act quickly enough to save more then a couple puppies.Thanks again!

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